title: Revisiting upper respiratory tract infection (URTI) in adults in the light of the current severe acute respiratory syndrome (SARS) situation in Singapore.
mesh_terms: D003937:Diagnosis, Differential; D005006:Ethnicity; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012141:Respiratory Tract Infections / Q000175:diagnosis / Q000453:epidemiology*; D045169:Severe Acute Respiratory Syndrome / Q000175:diagnosis / Q000453:epidemiology*; D012846:Singapore / Q000453:epidemiology